JBL Tune 520BT Wireless On-Ear Headphones - 57-Hour Battery Life, Bluetooth 5.3, Voice Aware Technology JBL Pure Bass Sound: Experience deep, powerful bass that enhances your music. 57-Hour Battery Life: Long-lasting performance for all-day listening. Bluetooth 5.3: Advanced connectivity for stable, fast pairing with devices. Lightweight and Foldable Design: Perfect for travel and on-the-go convenience. Voice Aware Technology: Enjoy clear hands-free calls and easy voice access. Impedance: 30 Ohm for high-quality audio output. Dynamic Frequency Response: Ranges from 20 Hz to 20 kHz for rich sound clarity. Single Microphone: For clear communication and voice commands. Quick Charge Feature: Just 2 hours of charging time provides extended use; 5 minutes of charge offers 3 hours of playback.